DSP56311CE1K34A Motorola Inc, DSP56311CE1K34A Datasheet - Page 4

• Manufacturer Part Number: DSP56311CE1K34A
• Description: DSP56311 Device Errata for Mask
• Manufacturer: Motorola Inc

Documentation Errata
4
ED28
ED29
ED30
Description (added 1/7/1997; identified as Documentation Errata 2/1/99):
When two consecutive LAs have a conditional branch instruction at LA-1 of the
internal loop, the part does not operate properly. For example, the following
sequence may generate incorrect results:
Workaround: Put an additional NOP between LABEL2 and LABEL1.
Pertains to: DSP56300 Family Manual, Appendix B, Section B-4.1.3, “At LA-1.”
Description (added 9/12/1997; identified as a Documentation errata 2/1/99):
When the ESSI transmits data with the CRA Word Length Control bits
(WL[2:0]) = 100, the ESSI is designed to duplicate the last bit of the 24-bit
transmission eight times to fill the 32-bit shifter. Instead, after shifting the 24-bit
word correctly, eight 0s are being shifted.
Workaround:
None at this time.
Pertains to: UM, Section 7.4.1.7, “CRA Word Length Control.” The table number
is 7-2.
Description (added 9/12/1997; identified as a Documentation errata 2/1/99):
When the ESSI transmits data in the On-Demand mode (i.e., MOD = 1 in CRB and
DC[4:0] = $00000 in CRA) with WL[2:0] = 100, the transmission does not work
properly.
Workaround:
To ensure correct operation, do not use the On-Demand mode with the
WL[2:0] = 100 32-bit Word-Length mode.
Pertains to: UM, Section 7.5.4.1, “Normal/On-Demand Mode Selection.”
internal loop
LABEL2
LABEL1
_DEST
DO #5, LABEL1
NOP
DO #4, LABEL2
NOP
MOVE (R0) +
BSCC _DEST
NOP
NOP
NOP
NOP
NOP
NOP
RTS
DSP56311 Device Errata for Mask 1K34A, Rev. 5
; conditional branch at LA-1 of
; internal LA
; external LA
Freescale Semiconductor
1K34A
1K34A
1K34A